During the month of November, you may notice a surge in classic burly, brawny facial hair…particularly mustaches. Why? Well, the infamous upper-lip hair has proven to be a great way to raise awareness for Movember Foundation‘s annual global charity which is committed to helping men live happier, healthier, longer lives. This is not a passing fad; the foundation has inspired the growth of a whopping five million November mustaches, and has raised $650 million since 2003.

In fact, HBO Now is celebrating Movember’s campaign by showcasing a collection of episodes and programs centered on iconic mustachioed characters pulled from the network’s archives. Expect to see Al Swearengen’s Deadwood mustache, as well as an assortment of fleecy characters from shows like True Detective, Game of Thrones, Veep, Flight of the Conchords, Six Feet Under, The Wire, Bored to Death, as well as Sex and the City. Now that’s a lot of facial hair! Fans of the bristly characters will be growing their own mustaches to tweet and post over the internet. All of this bewhiskered enthusiasm benefits research in prostate and testicular cancer, mental health, and physical inactivity.

Are you interested in growing your own mustache? If so, you have quite an assortment of styles and sizes from which to choose: curly, twirled, untamed, as well as horseshoe–, chevron-, pencil-, painter’s brush–mustaches to name just a few. From the beginning of film, Charlie Chaplan wore a toothbrush-style mustache for comedic effect while he preferred to go clean-shaven in his personal life. Similarly, Groucho Marx, Chuck Norris, Hulk Hogan, Tom Selleck, Burt Reynolds are among the mustached Hollywood elite.

As far as your acting career is concerned, if you’re a clean-shaven actor who is willing to wear a mustache some of the time, adding mustached headshots to your actor profile is a great way to showcase different looks. When going in for headshots, you can start by taking pictures with facial hair; and then bring along shaving supplies so you can end with your clean-shaven shots. With your Casting Frontier profile, you can switch your main headshot as often as you like to match whichever look you’re currently wearing. Just make sure when you go in for auditions that you appear as your main headshot–unless of course you’re asked to do otherwise. You never know which looks will land you more auditions until you try them.

How about you? Are you planning on joining in on the Movember Foundation’s month of growing a mustache?

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